I often listen to music while working or commuting. In the latter case, I use it to stimulate ideas for stories and characters. In both cases lyrics can be distracting. I need instrumentals.
I know squat about bands/genres these days, so I often find music by surfing random recommendations and search results from streaming services. A couple years ago I discovered that searching on "instrumentals" often returns interesting albums with songs that are kind of funky and repetitive. That's exactly what I need.
The other day on a whim I looked up one of the artists, which I almost never do. Turns out he wrote the music for a rap album. The "Instrumentals" version is the rap album without the rapper. When I looked at other instrumental albums I'd bookmarked, I realized it's a thing to release rap music without the vocals. Maybe so other people can rap over them? In any case I felt stupid after I realized it. A lot of these albums I've probably listened to dozens of times as background music, with no idea what they were.
Well, like a lot of people (including a lot of people picking TV soundtracks in the mid-90s), it wasn't until I read a lyrics sheet that I realized that Sarah McLachlan's "Possession" wasn't a sexytimes song. (And, well, then there's the background of the song...)
Similarly, it took looking at a lyrics sheet (or sufficient hearings of the song) to pick up that "You Oughta Know" represented a rather obsessive, stalkery situation rather than simple anger at a dickish ex-lover.